Why Mobile Base Stations need sync - Calnex Sol
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Answered by an industry expert ABSTRACT This critical requirement in today’s networks is explored by considering six key questions. Tim Frost Calnex Strategic Marketing Manager
Transcript of Why Mobile Base Stations need sync - Calnex Sol
Answered by an industry expert
ABSTRACT
This critical requirement in today’s networks is explored by considering six key questions.
Tim Frost Calnex Strategic Marketing Manager
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Mobile Technology Frequency accuracy
Phase accuracy
(Frame alignment to adjacent cells)
Time accuracy
(relative to overall system time)
CDMAOne, CDMA2000
±50 ppb N/A ±3µs (normal operation)
10µs (in holdover)
GSM ±50 ppb N/A
WCDMA (UMTS) ±50 ppb N/A
TD-SCDMA ±50 ppb ± 3µs N/A
LTE (FDD) ±50 ppb N/A
LTE (TDD) ±50 ppb ±3µs (< 3km cell radius)
±10µs (> 3km cell radius) N/A
LTE-A MBSFN ±50 ppb
±1 to 5µs
implementation dependent
N/A
LTE-A CoMP
(Network MIMO) ±50 ppb
LTE-A eICIC
(HetNet Coordination) ±50 ppb
Small Cells ±100 ppb
N/A (FDD)
±3µs (TDD)
±1 to 5µs (eICIC)
N/A
Home Cells ±250 ppb N/A (FDD)
±3µs (TDD) N/A
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3
Reference Clock
4
Macrocell
Small Cell
Cell edge area
